.main-container-class{
    -fx-background-color: #fff fff;
    -fx-alignment:top-center;
    -fx-spacing:0;
    -fx-pref-width:1020;
    -fx-pref-height:660;
    -fx-padding:0;
}
.main-container-class .left-nev-pane{
    -fx-pref-width:280;
    -fx-pref-height:440;
}